Comparative Analysis of Early and Late Radiotherapy Outcomes in Atypical Meningiomas

Overview

This study evaluates the impact of radiotherapy timing on long-term outcomes in patients with grade 2 meningiomas. Findings suggest that early adjuvant radiotherapy may improve progression-free survival compared to late intervention.

Background

Atypical meningiomas, classified as grade 2 by the WHO, represent a significant clinical challenge due to their higher recurrence rates and uncertain treatment protocols. Current guidelines recommend adjuvant radiotherapy after subtotal resection, but the optimal timing following gross total resection remains debated. Understanding the effects of radiotherapy timing is crucial for improving patient outcomes.

Data Highlights

No numerical data provided in the source material.

Key Findings

• Grade 2 meningiomas account for approximately 25% of meningiomas, with increasing incidence over recent classifications.
• Current guidelines recommend adjuvant radiotherapy for grade 2 meningiomas after subtotal resection, but its role after gross total resection is unclear.
• Historical data indicate a 3-year progression-free survival rate of 70% with gross total resection alone, increasing to nearly 90% with adjuvant radiotherapy.
• Ongoing trials (ROAM/EORTC 1308 and NRG BN003) aim to clarify the benefits of adjuvant radiotherapy after gross total resection.
• Variability in practice exists due to the lack of consensus on the timing of adjuvant radiotherapy for grade 2 meningiomas.

Clinical Implications

Clinicians should consider the timing of adjuvant radiotherapy in the management of grade 2 meningiomas, as early intervention may enhance progression-free survival. Ongoing trials will provide further guidance on optimizing treatment protocols.

Conclusion

The study underscores the importance of timing in adjuvant radiotherapy for grade 2 meningiomas, with early treatment potentially offering better outcomes. Continued research is essential to establish definitive treatment guidelines.

References

1. TROD Neuro-Oncology Group, Journal of Neuro-Oncology, 2025 -- Comparative Analysis of Early and Late Radiotherapy Outcomes in Atypical Meningiomas
2. Journal of Neuro-Oncology — Early Management Strategies for Newly Diagnosed WHO Grade 2–3 Adult Meningiomas Post-Surgery: Insights from the Dutch Brain Tumour Registry (2016–2021)
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4. The Influence of Medical Specialty on Publication Trends and Outcomes in Adjuvant Radiotherapy for WHO Grade 2 Meningiomas: A Systematic Review
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8. The Influence of Medical Specialty on Publication Trends and Outcomes in Adjuvant Radiotherapy for WHO Grade 2 Meningiomas
9. Cooperative Group Study Finds Radiation May Benefit Patients With Atypical Meningiomas
10. Central Nervous System Tumors Treatment (PDQ®)
11. Timing of adjuvant radiotherapy impacts overall survival for atypical intracranial meningiomas
12. Radiotherapy Quality Assurance in the ROAM/EORTC1308 Atypical Meningioma Randomised Controlled Trial